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stats.go
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/
stats.go
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package stats
import (
"os"
"os/signal"
"runtime"
"syscall"
"time"
log "github.com/sirupsen/logrus"
)
// StartStatsTicker starts a goroutine which dumps stats at a specified interval
func StartStatsTicker(d time.Duration) {
ticker := time.NewTicker(d)
go func() {
for {
<-ticker.C
LogStats()
}
}()
}
// RegisterStackDumper spawns a goroutine which dumps stack trace upon a SIGUSR1
func RegisterStackDumper() {
go func() {
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGUSR1)
for {
<-sigs
LogStack()
}
}()
}
// LogStats logs runtime statistics
func LogStats() {
var m runtime.MemStats
runtime.ReadMemStats(&m)
log.Infof("Alloc=%v TotalAlloc=%v Sys=%v NumGC=%v Goroutines=%d",
m.Alloc/1024, m.TotalAlloc/1024, m.Sys/1024, m.NumGC, runtime.NumGoroutine())
}
// LogStack will log the current stack
func LogStack() {
buf := make([]byte, 1<<20)
stacklen := runtime.Stack(buf, true)
log.Infof("*** goroutine dump...\n%s\n*** end\n", buf[:stacklen])
}